Bracket unit for tension screens



y 19753 D. J. RUST ET AL 2,638,163

BRACKET UNIT FOR TENSION SCREENS Filed April 30, 1951 Fk'gi! 1 9 mvzu-rons '.DavdJ.'RusZ Jack JLZJensen ATTORNEYS Patented May 12, 1953 BRACKET U IT FOR TENsioN SCREENS David Jordan Rust and Jack H. Jensen, San Leandro, Ca1if., assignors to Ry-Lock Company, Ltd., San Leandro, Calif; a corporation of California Application April 30, 1951, Serial No. 223,763

1 Claims. (01. 160-328) The present invention relates generally #to frameless window screens, and particularly to the screen tensioning device and themannerof securing the latter to the windowframe;

It is a prime object of this invention to provide a novel bracket unit, adapted to be secured to the window frame, as the support for a working part of a screen tensioning device.

Another object of the invention is to provide a bracket unit which is easy to install; there being novel locating and guide means embodied in the bracket unit to facilitate its installation in a correct, vertically adjustable, position.

A further object of the invention is to provide a metal bracket unit which is of simple but sturdy construction; the bracket unit being integral or one-piece, and designed for ease and economy of manufacture.

Still another object of the invention is to provide a practical and reliable bracket unit for tension screens, and one which will be exceeding- 1y effective for the purpose for which it is designed.

These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claim.

In the drawings:

Fig. 1 is a fragmentary rear elevation of a frameless window screen, showing one tensioning device and the corresponding bracket unit associated therewith.

Fig. 2 is a side elevation of such tensioning device and bracket unit.

Fig. 3 is a similar view, but shows the manner of use of the bracket unit, before its attachment, to locate the center point for the holding screw.

Fig. 4 is a sectional plan on line 44 of Fig. 2.

Referring now more particularly to the characters of reference on the drawings, the invention is embodied in a frameless window screen, indicated generally at I, which screen includes a bottom cross bar 2, and a top cross bar (not shown) which is secured to the header of a window frame 3 in a suitable manner. At each end the frameless window screen I is adapted to be maintained taut or under tension by means of a screen tensioning device, indicated generally at 4, secured in part to an end portion of the bottom cross bar 2, and in part to the adjacent blind stop 5 on the corresponding side 6 of said window frame 3.

As the screen tensioning devices 4 at opposite ends of the bottom cross bar 2 are identical, except that they are right and left hand, only 2 one of such devices is here shown and described.

Each screen tensioning device 4 comprises a longitudinal, upwardly opening channel I afiixed to the back side of the bottom cross bar 2 adjacent the end thereof; there being a finger pull 8 extending rearwardly from the bottom cross bar laterally inwardly of the channel 1.

A cam lever 9 is disposed above the channel I, being pivoted-as at Ill-in connection with a bracket unit, indicated generally at I I, attached to the adjacent blind stop 5. The cam lever 9 is flat, except for a rearwardly offset finger tab l2 at its outer end portion; such lever facing the screen and being swingable about its pivot 10 from an upstanding released position to a lowered screen tensioning position.

The lever 9 is formed, at its lower end, with a cam l3 eccentric to the pivot l0 and such cam, upon swinging of the lever 9 between its upstanding position to its lowered position, works in the channel 1 and forcefully urges the same, together with the bottom cross bar 2, downwardly, so as to effectively tension the screen I. The finger pull 8 is employed to initially draw the bottom cross bar 2 at its ends against the blind stops 5, at which time the lower edge of the eccentric cam 3 snaps easily into the channel I; the latter having-at its rear edge-a downwardly inclined deflector tongue l4.

The bracket unit I l which provides the pivotal mount for the cam lever 9 embodies the essence of the invention, and is constructed as follows:

The numeral l5 indicates a vertically adjustable attachment plate secured in face to face abutment against the corresponding blind stop 5 by means of a headed, holding screw l6 which extends through a vertically elongated slot IT in said attachment plate IS. The upperend of such slot I1 is enlarged or rounded, as at I8, to permit of passage of screw l6 therethrough; this for the purpose of facilitating initial engagement of plate IE on the screw [6, or its removal therefrom.

The vertically adjustable attachment plate I5 is maintained in proper alinement on the blind stop 5 by means of vertically spaced locating ears I9 which project laterally outwardly from the forward edge of said plate l5; such ears engaging against the front of said blind stop, as clearly shown in Fig. 4.

A flat bracket plate 20 projects laterally inwardly from the forward edge of the attachment plate l5 intermediate the locating ears I19; such bracket plate 20 thus facing the screen I and providing a face to face mount for the lower or cam end of the lever 9. Such lower or cam end of the lever 9 is connected to the bracket plate 20 by the pivot Ill, as aforesaid.

By reason of the vertically spaced locating ears I9, the described bracket unit can be secured in proper position on the corresponding blind stop 5 with aesingle holding screw Hi; there being no tendency of the bracket unit to cant out of position forwardly or rearwardly. Additionally, the bracket unit is further located by slightly deforming opposite ends of the attachment plate laterally outwardly, as at zl, whereby such-deformed ends tend to bite into the'sbiinfi 51 91 2 upon tight-chin of the headed holding scre ,w:

I 6. Thus, while the bracket unit H is vertically adjustable for proper settingof thelever 9 and its it, such bracket unit is normally positively held in position by reason of thefeatures above described.

. At its upper end .the attachment plate .il'lis m d wi n w d y -.e n s .lhneteh 1 whes p r o as fe w Before eachbracl' t unit i I istsecured; in place it; is disposed flush .;against the blind stop 5 ;with

the he n i against the lcn :Q sa d stop; suchtattachrnentiplateit being slid downwardly unt it abuts onerorner against the -top-of the ill as shown ingFig. ell-- notchzEQis thenusedto or-loca t th ceni terpoint-Bdforthescrfiiw. Thereafter, the-headd c d nas e i i r nt e ib 'n t ep 2 :atsuch poinawv ion is the; correct po nt for the .screw --to engage through the slot 1;! interrn edil t i ends- The de c ib -b acke i i 1 b i e piecernetal.construction, can e manufactpred readily and with economy; the bracket unit, :as termed: being-sturdy and providing a llery stable moun fo t lev r-firemthaf rce'mn dea r pt ni will bereadil een that th bee p d ced 1 such a device as;.-substantiall iulf lle'the objects ofy the inv ntion, a s -fo h merein- :lowing is claimed as new and useful, and upon which Letters Patent may be desired:

A bracket adapted to be secured against the transversely extending side of a blind stop of a window frame for mounting the working part of :a screen tensioning device, said bracket com- --prises;an=upstanding attachment plate adapted to engage said'side of the stop, a bracket plate projecting laterally inward from the outer edge ,of ,the attachment plate on which to mount said Working part, the attachment plate having a verticalkey-hole slot to receive a headed screw premounted in the blind stop to engage the slot interrnediateits ends .when theplateisdn ,anoperative: position, andears on one vertical 'edge of the attachment-plate disposed :in a plane parallel tonthe .slot .tooverlap and engage a lateral side of therblind stop Wherebythe plate is slidably J disposed on the stop; said plate at the top being provided with a centering notch alined with the slot to provide a-locating-means' for a screw prior to the mounting :of the same-"when the plate is-slid down to engage'the sillof the Window frame. I DAVID JORDAN RUST.

JACKH. JENSEN.

:Refierencesflited in thefile of this patent UNITED STATES BATENTS Number Name Date,

936,153 -QBri e n 40st. 5, .1909 .l$ 5;q -.W on .-,-.--V---- V--- J n- 1 2,449,275 Burns ,Sept. 114,119.48 35lf(, l;89 yE-riebe -Apr.-.3, -1,951 2,570,128 Jensen Oct. 2, 1 1951 

